<template>
    <div class="header">
        <div>头部 - 200行代码</div>
        <div class="box">盒子</div>
        <button>click me</button>
    </div>
  </template>
  
  <script>
  export default {
  
  }
  </script>
  
  <style scoped>
  .header{
      width: 100%;
      height: 300px;
      margin: 20px;
      /* background-color: skyblue; */
  }
  </style>